Air-current regulator



(No Model.) A

J. C. RANDALL. AIR CURRENT REGULATOR.

No. 557,428. Patented Mar. 31, 1896.

NITED STATES PAT NT FFICE.

JOHN C. RANDALL, OF SOUTH HAVEN, MICHIGAN.

AIR-CURRENT REGULATOR.

SPECIFICATION forming part of Letters Patent No. 557,428, dated March31, 1896.

I Application filed August 15,1895. Serial No. 559,370. (No model.)

To all whom it may concern:

Be it known that 1, JOHN C. RANDALL, a citizen of the United States,residing at South Haven, in the county of Van Enron and State ofMichigan, have invented certain new and useful Improvements inAir-Current- Regulators, of which the following is a specification,reference being had therein to the accompanying drawings.

My invention relates to a certain improved form of automaticallyoperated and operating mechanism for air-current regulation in order tothoroughly ventilate a compartment without admitting violent gusts orblasts of exterior air.

In the accomplishment of this end my invention consists in a devicewhich is adapted to be located in position between the casings of awindow and in the provision of mechanism whereby the quantity ofexterior air admitted to the interior is automatically regulated anddetermined by the apparatus itself whereby such a quantity, and thatalone, of external air is admitted to the interior as is desired toprovide therein suitable ventilation and the desired temperature, theapparatus being of such a character as that adjustments may be effectedwhereby a greater or less quantity of external air may be admitted asdesired.

Reference may now be had to the accompanying drawings for furtherfeatures of my invention and of objects to be attained, in whichdrawings- Figure 1 is a perspective view of the lower portion of awindow, showing my improved apparatus adjusted in position for use. Fig.2 is a transverse sectional view through the apparatus. Fig. 3 is anenlarged detail view showing the weighted regulator-lever andconnections between it and the regulator-valve. Fig. 4 is an enlargeddetail sectional view showing the hinge connection between theregulator-valve and the cross-bar. Fig. 5 is an enlarged detail view onthe line a: a: of Fig. 4, still further illustrating this hingeconnection. Fig. 6 is a cross-sectional view through the casings ofawindow and a plan view of the apparatus adjusted in position.

My improved apparatus consists in a boxdeflector 15, of quadrant shapein cross-section, having secured at its upper and lower portions thesupporting cross-bars 16 and 17, the circular body 18 of thebox-deflector being secured to the end pieces 19, the cross-bar 17 andthe outer cross-bar 20. A regulatorvalve 21 is hinged, in the manner tobe described, to the cross-bar 16 and extends longitudinally from end toend of the box-deflector. Held upon the upper edge of the cross-bar 16is an adjusting-bar 22, connected with the for mer by means of thescrews 23 passing through slots 24, Fig. 6, and entering said cross-bar16.

I will now describe the apparatus or mechanism for determining orregulating the amplitude of oscillations of the hinged valve 21 underthe influence of air-currents of varied strength. I provide aregulator-lever 25 pivoted at 26 and having its upper end free tooscillate in the arc of a circle. A weight 27 is adjustably held uponthe regulator-lever 25 above its pivot by means of a set-screw 28. Thelower portion of the regulator-lever 25 is formed into a quadrantal arm29, whose axis is the fulcrum of the regulator-lever 25. Secured to thevalve 21 is a quadrantal arm 30, whose axis is in line with the hinge ofthe valve 21. Secured to the upper end of the arm 29 is a flexibleconnector 31, the lower end of which is secured to the valve afterhaving passed about the quadrantal arm 30. A stop 32, Fig. 3,1imits theoscillation of the regulator-lever 25 to one direction. The hingeconnection between the valve 21 and its supporting-bar is shown in Fig.5.

In order to adjust the apparatus between the casings 33 of a window, thesame is generally positioned below the lower windowsash 34: and theadjusting-bar 22 located in position abutting against the window-stops35, Fig. 6, the screws 23 being loosened. \Vhen the cross-bar 16 hasbeen properly adjusted in position between the stops or bearing againstthem and the screws 23 secured, the apparatus is adjusted in position,the lower sash being brought down upon the adjusting-bar 22. Therelationship between the weight 28 of the regulator-lever 25 and thevalve 21 is such that when the latter is in a vertical position, asshown by the full lines in Fig. 2, the regulator-lever25 and its weight28 will be poised over its center of gravity, but'when the force of theair-currents is such that it becomes desirable to cut off the same thisequilibrium between the valve and weight is overcome and the formerassumes one of the positions shown by the dotted lines in Fig. 2, in oneinstance cutting off a portion of the air and in the other, which is thehorizontal position of the valve, cutting off the air entirely, thedegree of movement of the valve 21 being counterbalanced by the weight27 and the regulator-arm 25, which oscillates as shown by the dottedlines in Fig'. 3. As the weight is poised over its center of gravity andthe regulator-arm 25 in a vertical position when the valve 21 is in itsvertical position and as the regulator-arm is,

horizontal when the valve 21 is horizontal and in its closed position,each describing the arc of a circle, it is evident that as the valve isbalanced by the weight when horizontal it will also balance said valveat any point between the perpendicular and horizontal.

Having thus described my invention, what I claim as new therein, anddesire to secure by Letters Patent, is

1. In an air-current regulator the combination with the deflector of ahinged air-eontrolling admittance-valve, a regulator-lever pivotedindependently of said valve, a counterbalance-weight carried thereby andintermediate connections between the valve and the regulator-lever.

2. In an air-current regulator the combination with the deflector of ahinged air-controlling admittance-valve, a regulator-lever pivotedindependently of said valve, a counterbalance-weight carried thereby anda flexible connector between the valve and the regulator-lever.

In an aircurrent regulator the combination with a suitable deflector ofa valve pivoted therein exposed directly to the pressure of the externalair-currents and conditioned to move upon a definite pressure intopartially or completely closed positions, a counterbalance deviceoperatively connected with said valve consisting of a regulator-leverpivotally mounted, independently of the valve and a weight carried bysaid lever poised over its center of gravity when the valve is in itsextreme open position.

4. In an air-current regulator the combination with a suitable deflectorof a valve pivoted therein exposed directly to the pressure of theexternal air-current and conditioned to move upon a definite pressureinto partially or completely closed positions, a counterbalance deviceconsisting of a regulatorlever pivotally mounted independently of thevalve which lever is adapted to oscillate in a plane at right angles tothe plane of oscillation of the valve and a weight carried by said leverthe latter assuming a vertical position when the valve is open and ahorizontal position when the valve is closed.

5. In an air-current regulator the combination with the deflector of ahinged air-controlling admittance-valve, a regulator-level.- pivotallymounted independent of said valve, acounterbalance-weightand quadrantalarm carried by said lever and a quadrantal arm carried by the valvetogether with a flexible connector between the regulator-lever and thevalve.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN C. RANDALL. \Vi tnesses:

L. E. PARsoNs, S. II. -WILsoN.

